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Secure Access to Private EKS Clusters Without Bastion Hosts Using SSM

DEV Community·Paweł Swiridow·19 days ago
#FAa1OO8A
#devops#aws#eks#software#cluster#endpoint
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Accessing Private EKS Clusters Without Losing Your Mind Locking down your Kubernetes control plane is a basic requirement for any production environment. Exposing the EKS API server to the public internet is just asking for automated scanners to ruin your weekend. However, securing the endpoint creates an operational headache: how do you actually run kubectl when the API is sealed inside a private subnet? The traditional answer was a bastion host. But managing SSH keys, rotating credentials, and maintaining yet another publicly exposed EC2 instance is tedious. We all know that a "temporary" bastion host spun up on a Friday afternoon will inevitably become a load-bearing production pillar by Monday. Instead, we can use AWS Systems Manager (SSM) Session Manager. By leveraging the SSM agent already running on your EKS worker nodes, we can securely tunnel our local traffic directly to the private API endpoint without opening inbound ports or managing SSH keys.…

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